/*
 * Copyright 2002-2018 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.transaction.interceptor;

import org.springframework.aop.support.StaticMethodMatcherPointcut;
import org.springframework.dao.support.PersistenceExceptionTranslator;
import org.springframework.lang.Nullable;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.util.ObjectUtils;

import java.io.Serializable;
import java.lang.reflect.Method;

/**
 * Inner class that implements a Pointcut that matches if the underlying
 * {@link TransactionAttributeSource} has an attribute for a given method.
 *
 * @author Juergen Hoeller
 * @since 2.5.5
 */
@SuppressWarnings("serial")
abstract class TransactionAttributeSourcePointcut extends StaticMethodMatcherPointcut implements Serializable {

    @Override
    public boolean matches(Method method, Class<?> targetClass) {
        if (TransactionalProxy.class.isAssignableFrom(targetClass) ||
                PlatformTransactionManager.class.isAssignableFrom(targetClass) ||
                PersistenceExceptionTranslator.class.isAssignableFrom(targetClass)) {
            return false;
        }
        TransactionAttributeSource tas = getTransactionAttributeSource();
        return (tas == null || tas.getTransactionAttribute(method, targetClass) != null);
    }

    @Override
    public boolean equals(Object other) {
        if (this == other) {
            return true;
        }
        if (!(other instanceof TransactionAttributeSourcePointcut)) {
            return false;
        }
        TransactionAttributeSourcePointcut otherPc = (TransactionAttributeSourcePointcut) other;
        return ObjectUtils.nullSafeEquals(getTransactionAttributeSource(), otherPc.getTransactionAttributeSource());
    }

    @Override
    public int hashCode() {
        return TransactionAttributeSourcePointcut.class.hashCode();
    }

    @Override
    public String toString() {
        return getClass().getName() + ": " + getTransactionAttributeSource();
    }


    /**
     * Obtain the underlying TransactionAttributeSource (may be {@code null}).
     * To be implemented by subclasses.
     */
    @Nullable
    protected abstract TransactionAttributeSource getTransactionAttributeSource();

}
